Filling-detector mechanism



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ED STATES ."llftlllll' 0F MASSACI-I'USJET. ld.

FILilING-DETECTDR MEGHANSM.

application niet May @@ll't To all whom t may concern.:

lle it lrnovvn that l, llonas llonrrinoe, a citiaen ot the viUnited States, residing at llrlopedale, in the county ot llorcester and @tate oi Massachusetts, have invented certain new and nsel'ul lmprovements in ll4`illing-Detector Mechanisms; and ll do hereby declare the following to be a lull, clear, and enact description ot the invention, such as ivill enable others skilled in the art to which it appertains to malte and use the same.

rlFhe present invention relates to an improvenaient in lilling detector mechanisms tor looms.

Both plain and automatic looms are commonly provided with one or more lilling detector mechanisms, ivhich vdetermine the presence or absence ot the running hlling. lt the tilling is present, the detector mechanism does not atleet the loom operation; but it' the filling is absent, the detector mechanism etlects a change in the operation olu the loom, by either initiating the vvelt ree plenishing operation or by causing loom. stoppage. lt sometimes happens that the operation ot lilling detector mechanisms, as they have heretofore been constructed, is detective, that is to say, sometimes a change in the operation ol the loom is etlected when the running lilling is actually present; and sometimes when the filling is absent the change in the loom operation is not effected immediately, but is Vunnecessarily delayed two or more beats.

The object of the present invention is to produce a filling detector mechanism of such construction and arrangement of parts that the operation of detecting the resence 'or absence of the running filling Wlll be accurately performed, so that a change in the loom operation Will not be eii'ected unless the filling is actually absent, and so that in case the `illing is' absent, the necessary change in the loom operation Will be effected immediately and Without unnecessary delay. To the accom lishment of this object and such other objects as shall hereinafter appear, the present invention consists in the improved illin detector mechanism descrlbed in the lollowing specification and claims.

The preferred form in which it is contem- .narticularly pointed out in the appended Specification of letters latent.

Patented lllar., mi, lldld ser-nu itc. armar..

plated embodying the invention is illustrated in the accompanying drawings, in Which lligure l is a side elevation, partly in section, ot the improved lilling detector mechanisnn showing its relation with cer tain coperating parts ol the loom; il is a sectional elevation on an enlarged scale ont the rear or lett-hand end olf the parts shown in iF ig. l, showing particularly the improvements ot the present invention; llig. 3 is a section talren on the line dm3 ol lig. il; lig. l is a plan oil the tilling l'orlr alone; and llig. 5 is a rear end elevation thereoll.

Vltlie hlling detector mechanism ot the present invention comprises a lilling lorlr, generally indicated at 5, which, although radically ditlering in construction from the lilling lorlrs ol prior lilling detector meclianisms, perlorms the same .lunctioin namely, the detection ol2 the presence or absence et the running lilling. ller this purpose the illing torlr 5` is pivotally mounted on a detec tor slide 6 and is provided 'with downwardly extending lilling engaging members or lorlr tines 7 which cooperate with the grid d mounted on the lay 9. lhe torlr is lurther provided with a torlr tail or hail 1() which cooperates, when the lilling is absent, with the hoolr 11 pivotedA at l2 on the welt hammer lli. When the shuttle on its liight through the shed leaves a iilling thread in the shed and in front of the grid 8, the latter on its forward movement with the lay 9 presses the filling against the forli tines 7, thereby tilting the filling fork and raising the fork tail 10 out of the path of motion of the Wett hammerhook 11 so that the cross bar 16 on the fork tail may not be engaged by the shoulder 17 on the Weit hammer hook, But when the shuttle fails to lay filling in front of the grid, the filling fork 1s not tilted and thereupon the shoulder 17 of the Weit hammer hook engages the cross bar 16 of the fork tail, and the detector slide 6 is moved forward with the weft hammer to effect a change in the loom operation by either stoppin the loom or by initiating the weft replenis ing operation. The forward movement of the detector slide pushes outwardly the arm 18 which is connected with the loom stopping means, or with the weft replenishing mechanism. The detector slide 6 is mounted for sliding movements in a guidereason objectionable.

way 19 secured to the breast beam 2O of the loom. The above-described parts and their attributed functions, with the exception of the filling fork and the grid, are of usual onstruction and are familiar to those skilled in the art.

When the filling detector mechanism is performing its filling detecting function properly, the filling fork is tilted `by the filling, if it is present, onf each filling detecting beat-up of the lay, so that the detector slide will remain quiescent. The filling detecting beat-u of the lay is that beatup which occurs fol owing the boxing of the shuttle at the side of the loom on which the detector mechanism is located. If there is only one filling detector mechanism, every alternate beat-up of the lay will be the detecting beat; but if there are two filling detecting mechanisms, one located on each side of the loom, then every beat-up of the lay is a detecting beat. And so, also, -if the filling detector mechanism is performing its function properly, the filling fork will be in such position on a detecting beat that its fork` tail will be engaged by the weft hammer hook, if the filling be absent, on the corresponding forward movement of the weft hammer. But the filling detector mechanisms, asheretofore constructed, do not always functionate properly, asA hereinbefore set forth; sometimes the weft hammer hook engages the fork tail and moves forward the detector slide to effect an unnecessary change in the loom operation, even though the filling is present; and sometimes, when the filling is absent, the weft hammer hook does not engage the fork tail on the forward movement of the weft hammer corresponding to the detecting beat on which the filling is first absent, with the result that the loom stoppage or the weft replenishin operation isunnecessarily delayed. I-t tiias frequently been proposed, heretofore, to eliminate this defective functioning of the filling detector mechanism, and numerous more or less successfully operating deviceshave been produced. Many of the more successful of these devices are quite elaborate and expensive, and for that The structure ofthe present invention, by which the above-described defective functioning of the filling detector mechanism is eliminated, is exceedingly simple and inexpensive. This structure consists in a filling fork of such novel construction and arrangement of parts that the fork operates in the same manner whether the filling thread is heavy or light, or whether it is taut or slack. The condition of the filling both as to its size, and also as to its tautness or slackness. is the chief factor to consider in eliminating the defective functioning of the detector mechamsm. The present invention eliminates the defective functioning by producing a filling fork which is uniformly responsive to the filling, whatever its size or condition.

The improved fillin fork of the present invention comprises aody portion or yoke 22 which is pivoted at 23 on the rear end of the detector slide G. The fork tines 7 and the fork tail l0 are both carried by this yoke 22. The fork tail 10, which is a U-shaped member of wire, having its cross bar 16 at its front end, is connected with the yoke 22 in the manner very clearly shown in Figs. 2 and 4. The fork tines 7. it will be observed from an inspection of Fig. 2, are situated -well forward of the pivot 23 upon which the filling fork as a whole has its tilting movements. By locatingr the fork tines in this position relatively to the fork pivot, the fork tines swing directly upwardly without rst dipping, as would be the case were the fork tines located to the rear of the fork pivot. This contributes materially to ease of operation, and is of lespecial advantage Where it is desired for any reason to draw a filling end in front of the fork tines.

This novel location of the fork tines is one feature of the invention. The advan- .tages in locating the fork tines well forward of the fork pivot are many, chief of which are these: First, it is possible to make a successfully operative fork of very light construction. Where the fork tines are located rearwardly of the fork pivot. the fork tail must be heavy enough to more than counterbalance them. In the present construction theuweight of the tines themselves aids in returning the fork to normal position. Hence the possibility of a very light construction; second, it is this light construction of the fork which makes it uniformly responsive to all kinds and conditions of filling. And third, substantially the whole weight of the fork being on one side of the fork pivot, and this being the fork tail side, there is practically notendency of the fork tail to rebound. It is this rebounding of the fork tail, afterthe fork has been tilted by the filling, which is the chief cause of the defective functioning of the detector mechanism. The elimination of the rebounding of the fork tail eliminates the defective functioning.

A further feature of the invention resides in independently pivoting the fork tines, as at 25 on the yoke, so that they may yield relatively to the fork tail. This construction is of advantage in preventing breakage of the fork in case the shuttle should come to rest immediately behind the filling fork. The action of the filling fork in such a contingency is illustrated by dot and dash lines in Fig, l. The fork tail l0 is shown as pressing against the reed cap or hand rail 26, and the fork tines, having been struck by llO Cir

the shuttle, are shown yas having yielded relatively to the fork tail, thereby preventing both breakage and jamming ofthe fork. rlhe fork tines are normally held at right angles to the fork tail by means of a coiled spring 27 of light tension. This spring 27 materially aids in lsecuringthe uniform tilting action of' the filling Terka. It is observed, in practice, that when the filling strikes the fork tines, the inertia of the yoke and the fork tailis sufiicient to cause the spring to yield slightly before the fork tilts. Thus, since the shock yof' the advancing lillin is not communicated positively to the fork tail but rather is transmitted to it as an even pressure, the fork tail is raised to substantially a'uniform height on each detecting beat. Consequently the fork tail descends' and strikes substantially the same spot on the inclined surface 28 of the hook; and since there is practically no rebound of the fork tail, there is no liability, either that the fork tail will descend and be engaged by the hook 17 before the weft ham-` 'll`he lower ends 29 of the filling engaging members or 'fork tines, as shown in Figs. 3 and 5,` are joined together. The rounded portions 30 permit any loop formed around the fork tines to slip off easily so as not to interfere with the proper action of the fork. 1The middle bars 31,/ of the grid 8 are cut away at their lowerends, as shown in Fig. 3, to accommodate the joined-together portion of the fork tines.

'lhe filling fork construction of the present invention is believed to be radically new, and an important improvement in the filling detector mechanism art; it will be understood, therefore, that the invention may he embodied in other forms than that shown and described and still be within the spirit of the 'following claims.

Having thus described the invention, what l claim is:

.'l. il filling detector mechanism for looms having, in combination, a detector slide, si lilling fork pivoted on the slide having a ltorlr tail to coperate with the vve'lt ham mervvhen the filling is absent to mcve the slide, and depending fork tines mounted on the fork to normally lift the fork tail and to abnormally move yieldingly relatively toward the fork tail.

A filling detector mechanism for looms having, in combination, a detector slide, a filling fork pivoted thereon, fork tines pivotally mounted on the fork, and an elastic connection between the fork and the tines.

3. A filling detector mechanism for looms having, in combination, a detector slide, a filling fork pivoted on the slide having its tines pivotally mounted on the fork and located between the fork pivot and the breast beam of the loom. y

4. A filling detector mechanism for looms having, in combination, a detector slide, a filling fork pvoted on the slide having fork tines so positioned with relation to the fork pivot that their filling engaging portion strikes the filling between the fork pivot and the breast beam of the loom and is thereby caused to rise directly upwardly without first dipping.

5. A filling detector mechanism for looms having in combination, a detector slide, a filling fork pivoted on the slide having a fork tail to coperate with the weft hammer on filling absence, and depending fork tines adapted on filling presence to cooperate vvith the filling to prevent the coperation between the fork tail and the weft hammer, said fork tailand ii'ork tines being situated on the same side of the fork pivot.

6. A filling detector mechanism for looms having.- in combination, a detector slide mounted to move toward and from the front of the loom, a filling fork mounted on the slide having a fork tail adapted to coperate with the weft hammer on filling absence to move the detector slide, and depending fork tines mounted on the fork to have a, yielding movement toward the fork tail.

7. A filling detector mechanism for looms having, in combination, a detector slide and a filling fork having a yoke pivotally mounted on the slide, a fork tail rigidly secured to the yoke, :fork tines `pivotally mounted on the yoke, and a spring tending to hold the 'fork tines in normal relation to the 'forli tail.

Jonas non'rnnor.

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